In a School 150 students passed X Standard examination. 95 students applied for Group I and 82 students applied for Group II in the Higher Secondary course. If 20 students applied neither of the two, how many students applied for both groups

Answers (1)
S safeer

The total number of students 150. 

Total number of students applied 150-20=130

\\n(AuB)=n(A)+n(B)-n(A\cap B)\\130=95+82-n(A\cap B)\\n(A\cap B)=177-130=47

47 students applied for both

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